Just because it cannot be done today, doesn't mean there is not a real appetite in large enterprises to do exactly this.
Without naming names, I know of at least one public company with a real hunger for exactly this eventuality.
They are just hearing the promise that AI will allow them to build custom software that perfectly melds to their needs in no time at all, and think it sounds great.
I suspect the early adopters who go this route are going to be in for a rude awakening that AI hasn’t actually solved a lot of hard problems in custom software development.
Of course, once AGI is available (if it is ever) everything changes. But for now someone needs to have the deep expertise.
I cannot imagine an SMB or fortune 500 ripping out Salesforce or SAP. However, I can see a point-tool going away (e.g., those $50/mo contracts which do something tiny like connect one tool to another.)